YEE HSIUNG2018-09-102018-09-101986-0405562821http://inspirehep.net/record/231109http://scholars.lib.ntu.edu.tw/handle/123456789/323326https://www.scopus.com/inward/record.uri?eid=2-s2.0-0001185424&doi=10.1103%2fPhysRevD.34.2584&partnerID=40&md5=1484a16054cd44895fe4f0ef92104a0cWe present results on the production of hadrons in collisions of 400-GeV/c protons with beryllium, copper, and tungsten nuclei. The data cover the region from 5.6 to 8.0 GeV/c in the transverse momentum of the final-state hadron and from 73° to 102° in the proton-nucleon center-of-momentum frame production angle theta*. The restriction of the data to values of xT (xT=2pT/ s) greater than 0.4 enriches the sample with hard collisions of valence quarks. Asymmetries about theta*=90° reflect the presence of neutrons in the target nuclei. The variation of the atomic-weight dependence parameter with production angle is discussed in the context of the phenomenology of nucleonic structure within nuclei. We also extrapolate our measurements to a deuteron target to minimize nuclear effects and compare the result to QCD calculations. © 1986 The American Physical Society.journal article10.1103/PhysRevD.34.25842-s2.0-0001185424WOS:A1986E502500005